How to factorize x 2 +root2x-4
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x² +√2 x -4
=x² +2√2 x -√2 x -4
=x(x+2√2) -√2(x+2√2)
=(x+2√2)(x-√2)
=x² +2√2 x -√2 x -4
=x(x+2√2) -√2(x+2√2)
=(x+2√2)(x-√2)
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